A) unfamiliar B) fit in C) assigned D) acclimated E) spread F) colorful G) come along H) change I) reproduces J) permanent K) prisoners L) methods M) allows N) alternative O) disadvantages · When we move an animal from its home in the tropics (热带地区) to a cold climate, it is likely to die if we don't keep it warm. And animals_________________ to cold climates will die if they are moved to the tropics. Many plants, too, will die if they are removed from the place where they normally grow and are transplanted (移植) into an_________________ soil. Almost every species has adapted to life in a particular place by its organs and their functions and by_________________ habits. The specialized adaptation has great advantages, for it_________________ many organisms to survive under different conditions. It also has_________________ , for it means that the life of most species is controlled by local conditions. Living things are not_________________ over the earth freely; most species have definite habits for living places. Ecology is the study of how organisms live in their environment. This means finding out how an organism survives and_________________ in certain surroundings. By environment we mean not only the soil and the climate but the living things of the same species and other species, plant or animal. Most living things are_________________ of their environment. Some can_________________ certain features of their environment to suit themselves; a beaver (海狸), for example, can make ponds by building dams, many birds and insects can build elaborate nests to provide shelter for their young. But these skills are restricted and highly specialized. Most organisms must adapt their bodies to_________________ with their surroundings, and since they can adapt only to particular surroundings, they are found only in places where they can live successfully with the least effort.